How to study a root without uprooting a plant? This will solve the problem. When plants are placed in our tank, the roots spread out to seize as much water as possible. When they encounter the sloped wall, they will spread along them, providing a clear and dramatic view of the intricate root systems. Our unit is 10" x 4.5" x 8" and constructed of welded acrylic, making it very durable. Slides slope at a 20 degree angle. Integrated tray catches run-off from watering, limiting the mess. Holes in the bottom for easy draining. Attractive enough to be a centerpiece in an office or lobby, our low-cost unit is essential to any biology classroom.Twelve units fit perfectly in the GreenBox.